how do u remove a valve seat from a head, and install the new one?
use the valve guide puller
There are a number of procedures that can work, depending on the metallurgy of the head and the valve seat. Most hobbyists and many professional auto mechanics farm the job out to a machine shop, as part of an overhaul process, where the cylinder head is reconditioned, with new valve and valve spring hardware, and thorough de-carbonizing, along with machine work needed to ensure the completed head assembly is true in all dimensions, and ready for replacement on the engine. Here's a link to a page that discusses the process in detail:
UNLESS YOU CAN GRIND THE VALVE AND SEAT TO FIT, SEND IT TO A MACHINE SHOP.
takes a stand up mill. to cut the seat and heat the head and install the new seat...
What engine? Not all heads have valve seats that are pressed in. Some (many later model cars) have the seats ground right into the head and are not removable.
